22121001012111 has 16 divisors (see below), whose sum is σ = 30062372351616. Its totient is φ = 14463689269536.

The previous prime is 22121001012053. The next prime is 22121001012151. The reversal of 22121001012111 is 11121010012122.

It is a happy number.

It is not a de Polignac number, because 22121001012111 - 2¹⁴ = 22121000995727 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22121001012151) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25500685 + ... + 26353878.

It is an arithmetic number, because the mean of its divisors is an integer number (1878898271976).

Almost surely, 2^{22121001012111} is an apocalyptic number.

22121001012111 is a deficient number, since it is larger than the sum of its proper divisors (7941371339505).

22121001012111 is a wasteful number, since it uses less digits than its factorization.

22121001012111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51857302.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 22121001012111 its reverse (11121010012122), we get a palindrome (33242011024233).

The spelling of 22121001012111 in words is "twenty-two trillion, one hundred twenty-one billion, one million, twelve thousand, one hundred eleven".